A SERVICE OF

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TROUBLE PROBABLE CAUSE REMEDY
No
wire
feed.
Robot
signal.
Check
input
signal
from
robot
to
motor
board
PC2.
Signal
should
be
0-10
vdc
between
pins
K
and
B (common)
on RC5.
-
Relay
CR1
not
working.
Replace
CR1.
Motor
board
PC2
not
work-
ing.
Replace
PC2
(see
Section
5-4).
Wire
feeds
at
maximum. Tach
board
PC5
at
wire
drive
motor
not
working.
Replace PC5.
No
arc
voltage control.
Voltage
control
connec-
tions.
Check and
secure
connections
(see
Section
2-3).
Wire
stick sensing
connec-
tions.
Check
and
secure
connections
(see
Section
2-3).
Voltage
board
PCi
not
working.
Replace
PCi
(see
Section
5-4).
Incorrect robot command
voltage.
Check
robot command
voltage at voltage
board
PCi.
Command
voltage
should
be
0-10
vdc
bet
ween pins
BB
and
CC
(common)
at
RC25.
Robot
shuts down
due
to
Touch
Sensor
error.
Touch
Sensor
connections.
Check
continuity
of
leads
between
gun/torch
and
gas/current
sensing
control.
Repair
or
replace.
Secure
all
connections.
Robot
moves
when
welding
wire
is
stuck.
Wire
stick
connection.
Be
sure
that
red lead
is
connected
to
terminal
52
and
blue
lead
is
connected
to
terminal
50 on
welding
power
source
interface
14
position
ter
minal
strip.
Wire stick
sensing
connec-
tions.
Check
and
secure
connections
(see
Section
2-3).
Wire
speed
(1PM)
meter
goes
to
zero.
Incorrect
robot command
voltage.
Check
robot command
voltage at motor
board
PC2.
Signal
should
be
0-10
vdc between
pins
K
and
B
(common)
at
RC5.
Motor
board
PC2
not
work-
ing.
Replace
PC2 (see
Section
5-4).
No
wire
retract.
Control
relay
CR2
not
work-
ing.
Replace
CR2.
Interface
board
PC3
not
working.
Replace
PC3
(see
Section
5-4).
Incorrect
robot command
voltage.
Check
robot command
voltage at motor
board
PC2.
Signal
should
be
0-10
vdc between
pins
K
and
B
(common)
at
RC5.
Robot
shuts
down.
Loose
weld
output
connec-
tions.
Clean
and
tighten
connections.
Interconnecting
cords.
Check
all
interconnecting
cords for
breaks;
repair
or
replace.
Check
and
secure
all
connections.
Interface
board
PC3
not
working.
Replace
PC3
(see
Section
5-4).
OM-882
Page
11